Carpathia was sailing from New York City to Fiume, Austria-Hungary (now Rijeka, Croatia) on the night of Sunday, 14 April 1912. Among her passengers were the American painters Colin Campbell Cooper and his wife Emma, journalist Lewis P. Skidmore, photographer Dr. Francis H. Blackmarr, and Charles H. Marshall, whose three nieces were travelling aboard Titanic.

Carpathia '​s wireless operator, Harold Cottam, had missed previous messages from Titanic, as he was on the bridge at the time.[1] He then received messages from Cape Race, Newfoundland, stating they had private traffic for Titanic. He thought he would be helpful and at 12:11 a.m. on 15 April sent a message to Titanic stating that Cape Race had traffic for them. In reply he received Titanic's distress signal.[1] Cottam awakened CaptainArthur Henry Rostron, who immediately set a course at maximum speed (17 kn (20 mph; 31 km/h)) to Titanic's last known position, approximately 58 mi (93 km) away. Rostron ordered the ship's heating and hot water cut off in order to make as much steam as possible available for the engines.[citation needed] At full speed it took the Carpathia four hours to reach Titanic, while Titanic only stayed afloat for two hours and sank before Carpathia arrived, claiming the lives of 1,523 of her passengers/crew. At 4:00 a.m., Carpathia arrived at the scene, after working her way through dangerous ice fields, and took on 705 survivors of the disaster from Titanic's lifeboats.[1]

A medal awarded to a Carpathia crew member for their part in the rescue of Titanic survivors

During the First World War, Carpathia was used to transfer Canadian and American troops to Europe. She was used as a troopship by the Canadian Expeditionary Force.[2] At least some of her voyages were in convoy, sailing from New York through Halifax to Liverpool and Glasgow.[3] Among her passengers during the war years was Frank Buckles, who went on to become the last surviving American veteran of the war.

Carpathia sinks after getting hit by three torpedoes fired by the Imperial German Navy submarine U-55

On 15 July 1918, Carpathia departed Liverpool in a convoy bound for Boston. On the summer morning of 17 July she was torpedoed, at 9:15, in the Celtic Sea by the Imperial German NavysubmarineU-55. Of three torpedoes fired at the ship, one impacted the port side while the other penetrated the engine room, killing two firemen and three trimmers.[4] As Carpathia began to settle by the head and list to port, Captain William Prothero gave the order to abandon ship. All 57 passengers (36 saloon class and 21 steerage) and 218 surviving crew members boarded the lifeboats as the vessel sank.[4]U-55 surfaced and fired a third torpedo into the ship and was approaching the lifeboats when the Azalea-classsloopHMS Snowdrop arrived on the scene and drove away the submarine with gunfire before picking up the survivors from Carpathia.

Carpathia sank at 11:00 AM at a position recorded by Snowdrop as 49.25 N 10.25 W, approximately 120 mi (190 km) west of Fastnet.

On 9 September 1999, the Reuters and AP wire services reported that Argosy International Ltd., headed by Graham Jessop, son of the undersea explorer Keith Jessop, and sponsored by the National Underwater and Marine Agency, had discovered Carpathia '​s wreck in 600 ft (180 m) of water, 185 mi (298 km) west of Land's End.[5] Bad weather forced his ship to abandon the position before Jessop could verify the discovery using underwater cameras. However, when he later returned to the location the wreck proved to be not that of Carpathia but that of the Hamburg-America Line's Isis, sunk on 8 November 1936.[6]

In 2000, the American author and diver Clive Cussler announced that his organisation, NUMA, had found the true wreck of Carpathia in the spring of that year,[7][8] at a depth of 500 ft (150 m).[9] After the submarine attack Carpathia landed upright on the seabed. NUMA gave the approximate location of the wreck as 120 mi (190 km) west of Fastnet, Ireland.[10]

The vessel is currently owned by Premier Exhibitions Inc., formerly RMS Titanic Inc., which plans to recover objects from the wreck.[9] The same company owns the salvor-in-possession rights of Titanic, from which many artifacts have been recovered and are on display in worldwide exhibitions.[citation needed]